<template>
  <div  id="leftside">
    <h3>目录 {{HeaderIndex}} </h3>
    <div v-if="true||HeaderIndex=='1'">
      <el-tree :data="data" :props="defaultProps" @node-click="handleNodeClick"></el-tree>
    </div>
    <div v-if="HeaderIndex == '2'">
      <el-tree :data="data" :props="defaultProps" @node-click="handleNodeClick"></el-tree>
    </div>
    <div v-if="HeaderIndex=='3'">
      <el-tree :data="data" :props="defaultProps" @node-click="handleNodeClick"></el-tree>
    </div>
    <div v-if="HeaderIndex=='4'">
      <el-tree :data="data" :props="defaultProps" @node-click="handleNodeClick"></el-tree>
    </div>
  </div>
</template>

<script>
console.log("leftside")

export default {
  // el:"#leftside",
  name: 'LeftSide',
  data() {
      return {
        data: [{
          label: '一级 1',
          children: [{
            label: '二级 1-1',
            children: [{
              label: '三级 1-1-1'
            }]
          }]
        }, {
          label: '一级 2',
          children: [{
            label: '二级 2-1',
            children: [{
              label: '三级 2-1-1'
            }]
          }, {
            label: '二级 2-2',
            children: [{
              label: '三级 2-2-1'
            }]
          }]
        }, {
          label: '一级 3',
          children: [{
            label: '二级 3-1',
            children: [{
              label: '三级 3-1-1'
            }]
          }, {
            label: '二级 3-2',
            children: [{
              label: '三级 3-2-1'
            }]
          }]
        }],
        defaultProps: {
          children: 'children',
          label: 'label'
        }
      };
  },
  props:{
    HeaderIndex : String,
  },
  methods: {
    handleNodeClick(data) {
      console.log(data);
    }
  }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style  lang="css" scoped>
#leftside{
  border: 2px;
  background-color: aqua;
}
</style>
